JPH078216Y2 - Exposure head for image recording device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an exposure head for an image recording apparatus, and more particularly, to a plurality of light emitting elements for reproducing an image on a record carrier with the same supporting member. While holding the electrodes, the electrodes connected to each of the light emitting elements are fixed to a holding member, for example, a land of each pattern formed on a printed circuit board, and a control unit or the like is provided at an end extending outward of each pattern. The present invention relates to an exposure head for an image recording apparatus, in which breakage of an electrode is prevented by soldering a conductive wire that can be freely connected to, and the work of connecting each conductive wire can be easily and surely performed.

BACKGROUND OF THE INVENTION For example, an image recording apparatus has been proposed which reads a color image signal recorded on a recording medium such as a floppy disk or an optical disk and reproduces a visible image on a record carrier such as photographic paper.

In such an apparatus, a plurality of light emitting elements having different output wavelengths are driven based on an input image signal, and each color of cyan (C), magenta (M), and yellow (Y) is colored on a color printing paper. In this case, a color image is formed by superimposing light from each light emitting element controlled to have a predetermined output on the same place on the color printing paper.

Here, in practice, an exposure head is used to form a color image on a record carrier such as photographic paper. The exposure head has a plurality of supports into which each light emitting element and a condensing optical system are incorporated, and the supports are arranged with a predetermined distance offset in the main scanning direction of the record carrier through the housing. Then, the record carrier is wound around the image recording drum and rotated in the main scanning direction, and the housing is moved in the sub scanning direction substantially orthogonal to the main scanning direction to two-dimensionally form a color image on the record carrier. Is forming.

Therefore, conventionally, an exposure head has been desired in which a plurality of light emitting elements are mounted on a single support and the light emitted from each light emitting element is irradiated onto a record carrier by a single optical system to form an image. There is. With such an exposure head, even if the number of light emitting elements is increased, only a single support and an optical system are used, and an extremely inexpensive exposure head can be provided. Moreover, if this type of exposure head is used when reproducing a monochrome image, it becomes possible to dispose a plurality of light emitting elements of the same type in the main scanning direction and the sub scanning direction, which results in a more efficient image recording operation. The advantage of being able to carry out is obtained.

By the way, in this case, since the respective light emitting elements are arranged corresponding to the intervals of the respective pixels formed on the record carrier, it is substantially necessary to position the respective light emitting elements at extremely small intervals (on the order of microns). There is. Therefore, the electrodes electrically connected to the respective light emitting elements have a fine diameter and are arranged in close proximity to each other. However, in this way, when the electrodes are close to each other, the connection work becomes complicated when connecting a lead-equipped connector to each electrode in order to individually control the light emission amount of each light-emitting element. . That is, if a conductor is attempted to be soldered to each of the electrodes arranged at a narrow interval, other adjacent electrodes will hinder the soldering work, and the adjacent electrodes will be integrally soldered together. As a result, it becomes difficult to ensure the electrical insulation between the electrodes. In particular, when a large number of light emitting elements are arranged, this kind of defect becomes more remarkable. Moreover, since the electrode itself is made of a fine diameter, there is a problem in strength, and the electrode is easily broken when connecting via the conductor wire.

[Object of the Invention] The present invention has been made in order to overcome the above-mentioned inconveniences. A printed circuit board on which a plurality of patterns corresponding to the number of light emitting elements are formed is prepared. While fixing the electrode connected to the land to the land provided at the inner end of each pattern, at the outer end of the pattern,
For example, a conductor wire extending from the connector is connected by soldering or the like, so that the conductor wire connection work can be easily and surely performed without causing insulation failure even when a large number of light emitting elements are used. It is an object of the present invention to provide an exposure head for an image recording apparatus, which can prevent the breakage of the electrode itself.

[Means for Achieving the Object] In order to achieve the above object, the present invention provides an exposure head for forming an image by irradiating a record carrier with light from a plurality of light emitting elements controlled based on an image signal. A plurality of light emitting elements are disposed and electrically connected to each of the light emitting elements, and a conductive base integrally formed with a long heat dissipation base on one surface thereof; A support member that is fitted to the base and supports the base, an electrode that is fitted to the support member and is connected to each of the light emitting elements, and a plurality of holes that are fitted to the heat dissipation base and each electrode are formed. And a holding member that holds the support member and the holding member at a predetermined distance from each other, and the holding member has the electrode and the heat dissipation member at one end extending inward of the holding member. The conductive portion electrically connected to the base is provided, and It is characterized in that a conducting wire connectable to a control portion or the like is attached to the other end portion extending to the outside of the conductive portion.

[Embodiment] Next, a preferred embodiment of an exposure head for an image recording apparatus according to the present invention will be given and described in detail below with reference to the accompanying drawings.

In FIG. 1, reference numeral 10 indicates a main body of an image recording apparatus incorporating the exposure head according to the present embodiment. The main body 10 is surrounded by a casing 12, and an exposure unit 14, a water coating unit 16, a thermal development transfer unit 18, and a control unit 20 that controls these units are provided inside the main body unit 10.

A magazine 22 for accommodating the photosensitive material F wound in a roll is loaded in the main body portion 10, and the photosensitive material F taken out from the magazine 22 is transferred to the exposure portion 14 via a cutter 24. The exposure unit 14 includes a drum 26 that rotates at a high speed in the direction of arrow A (main scanning direction), and the exposure head 30 according to the present embodiment is arranged in the vicinity of the drum 26. In this case, the exposure head 30 moves in the arrow B direction (sub-scanning direction) via a wire or the like (not shown) (see FIG. 2).

As shown in FIGS. 2 and 3, the exposure head 30 includes a relatively long cylindrical body 34 having a condenser lens 32 mounted thereon,
A short support 36 is fitted to one end of the cylindrical body 34. The support 36 has a substantially cylindrical shape, and a disc-shaped support member 38 is fitted and mounted on an inner peripheral wall portion of the support 36. The support member 38 is substantially made of a heat-resistant electrically insulating material such as a ceramic material, and the support member 38 is formed with holes 40a and 40b having a relatively large diameter. Furthermore, the support member
The support member 38 is located on both sides of the holes 40a and 40b.
Six small-diameter holes (not shown) are formed at equal intervals from the center of the.

Therefore, the first base 44 and the second base 46 are attached to the support member 38.
And are installed. The first base 44 is made of a conductive metal material, has an octagonal shape, and has a long heat dissipation base 48 integrally formed on one surface thereof so as to be fitted in the hole 40a of the support member 38. . The second base 46 has an octagonal shape like the first base 44, and is integrally provided with a long heat dissipation base 50 that fits into the hole 40b of the support member 38. On the other hand, the electrode pins 52a to 52f are fitted into the six holes (not shown) of the support member 38, respectively, and the electrode pins 52a to 52f are respectively inserted.
Large-diameter joints 54a to 54f are integrally formed at the ends of the.

Then, the pair of first LEDs 56a, 56b and the pair of second LEDs 58a, 58b are fixed to the first base 44 with a predetermined gap therebetween,
The second base 46 is provided with a pair of third LEDs 60a, 60b spaced apart from the second LEDs 58a, 58b by a predetermined distance. That is,
The first LEDs 56a, 56b and the second LEDs 58a, 58b are arranged with their N-type regions substantially positioned on the side of the condenser lens 32, while the third LED
The EDs 60a and 60b are provided with their P-type regions oriented toward the condenser lens 32 side. Therefore, the first LED 56a, 56b and the second LED
58a and 58b are mounted on the first base 44, and the third LEDs 60a and 60b are fixed to the second base 46 so as to be individually controlled.

In this case, the first LEDs 56a and 56b irradiate the light-sensitive material F with infrared light that causes the dye of cyan (C) to develop, and the second LEDs 58a and 56b.
The a and 58b irradiate red light for coloring the magenta (M) dye, and the third LEDs 60a, 60b irradiate yellow light for coloring the yellow (Y) dye. The first LEDs 56a and 56b are
2LED 58a and 58b and 3rd LED 60a and 60b as well as condenser lens
2 adjacent to each other in the sub-scanning direction of the photosensitive material F via 32
They are spaced apart so as to collect light on one pixel. In this case, different types of first LEDs 56a, 56b and second LEDs 58a, 58b and
The distance between the 3LEDs 60a and 60b is selected so that the light emitted from each of the 3LEDs 60a and 60b is condensed through the condenser lens 32 at a position that is an integral multiple of the distance between the pixels of the photosensitive material F in the main scanning direction.

Further, the first LEDs 56a, 56b and the joints 54a, 54d are connected to each other by the conductive wire 62.
The second LEDs 58a and 58b are electrically connected by a and 62b.
And the joints 54b and 54e are connected by conducting wires 62c and 62d, respectively. On the other hand, the third LED 60a, 60b and the joint portion 54c, 54f to the conductive wire 62
Connect via e and 62f.

Therefore, the supporting member 38 is a disk-shaped holding member having a relatively large diameter,
That is, the printed circuit boards 64 are connected. Printed board
Holes 66a and 66b for fitting the heat dissipation bases 48 and 50 are formed in the central portion of 64, and the electrode pins 52a to 52f are formed.
Holes 68a to 68f with a small diameter for fitting the printed circuit board
It is formed at equal intervals from the center of 64. As shown in FIG. 4, the printed circuit board 64 has first and second patterns which are conductors extending from the vicinity of the center thereof in the radial outward direction, respectively.
70a and 70b are formed. In this case, the land 72 including the holes 66a and 66b is provided on the inner side of the first and second patterns 70a and 70b.
a and 72b are provided. On the other hand, the third pattern 74a to the eighth pattern 74f are formed at equal intervals from the center of the printed circuit board 64, respectively. The third patterns 74a to 8th
The pattern 74f extends for a predetermined length in the radial outward direction of the printed circuit board 64, and lands 76a to 76f including holes 68a to 68f are provided on the inner sides of the patterns 74f.

The holes 66a, 6 of the printed circuit board 64 configured in this way
Fit the heat dissipating bases 48 and 50 to 6b and insert the other holes 68a.
The electrode pins 52a to 52f are inserted into the electrodes 68a to 68f and the electrode pins 52a to 52f are soldered to the lands 76a to 76f. Then, the terminal-treated lead wires 78a, 78b are soldered to the outer end portions of the first and second patterns 70a, 70b, while the outer end portions of the third pattern 74a to the eighth pattern 74f are similarly terminated. The processed lead wires 80a to 80f are soldered. Accordingly, the connectors 82 connected to the respective lead wires 78a, 78b and 80a to 80f are connected to the first LEDs 56a, 56b and the second LEDs 58a, 58b.
And connected to the third LED 60a, 60b. The connector 82 can be connected to the control unit 20 via another connector (not shown).

In the water application section 16, dampening water is applied to the exposed surface of the photosensitive material F transferred from the exposure section 14, and this photosensitive material F is transferred to the heat development transfer section 18. A tray 84 for accommodating the sheet-shaped image receiving material P is loaded on the upper part of the heat development transfer section 18. The image receiving material P is separated into sheets by the conveying roller 86, and is transferred to the heat development transfer section.
Transferred to 18. In this case, in the heat development transfer section 18, the photosensitive material F and the image receiving material P are superposed, and heat development processing and color image transfer processing are performed on them. On the other hand, a take-out tray 88 is provided on the upper surface of the casing 12, and the take-out tray 88 has an image receiving material P to which a color image is transferred.
Are unloaded. Further, a waste box 90 is arranged below the casing 12, and the waste box 90 stores the photosensitive material F carried out from the heat development transfer section 18.

The exposure head according to the present embodiment is basically configured as described above, and its operation and effect will be described next.

First, a processing procedure for transferring and forming a color image on the image receiving material P will be described with reference to FIG.

Therefore, the photosensitive material F stored in the magazine 22 is exposed in the exposure unit 14
The cutter 24 cuts the rear end of the sheet when the sheet has been sent out by a predetermined amount. Next, the photosensitive material F transferred to the exposure unit 14 is wound on the drum 26 and then exposed by the first LEDs 56a, 56b, the second LEDs 58a, 58b and the third LEDs 60a, 60b mounted on the exposure head 30. . In this case, the light-sensitive material F has cyan pixels formed by the first LEDs 56a and 56b,
Magenta color pixel by the second LED58a, 58b, and the third LED60
The yellow pixels of a and 60b are formed at the same time.
Then, as described above, the first LED 56a, 56b and the second LED 58
Since the a and 58b and the third LEDs 60a and 60b are separated from each other by a predetermined distance in the main scanning direction, the drum 26 rotates at a high speed in the direction of arrow A (main scanning direction), so that cyan, magenta, and yellow colors are obtained. Overlap each other to form a pixel of a desired color. Further, the support member 38 has the same LEDs 56a, 56b, and 58a, respectively.
And 58b and 60a and 60b are arranged side by side, and the photosensitive material F
Two pixels are simultaneously formed in the sub-scanning direction. Therefore, the exposure head 30 moves in the direction of arrow B (sub-scanning direction) to record a two-dimensional color image on the photosensitive material F.

Then, the photosensitive material F on which the color image is recorded is transferred to the drum 26.
Water is applied to the water application section 16 by rotating the arrow in the direction opposite to the arrow A direction.
Transferred to. The exposed surface of the photosensitive material F transferred to the water application section 16 is applied with dampening water, and is sent to the heat development transfer section 18.

On the other hand, the image receiving material P stored in the tray 84 is conveyed by the conveying roller 86.
The heat-sensitive transfer section 18 superimposes it on the photosensitive material F. In this case, in the heat development transfer section 18, the color image is developed by heating the photosensitive material F, and then this color image is transferred to the image receiving material P.
The image receiving material P on which the color image has been transferred is discharged to the take-out tray 88, and the photosensitive material F is discharged to the waste box 90.

In this case, according to the present embodiment, by using the printed board 64, it is possible to prevent breakage of the electrode pins 52a to 52f and the like, and to assemble the exposure head 30 easily and favorably.

That is, the first LED 56a, 56b and the second LED 58a, 58b and the third LED 60
The a and 60b are substantially positioned corresponding to the pixel spacing of the photosensitive material F on the order of microns. Therefore, each
Leads 62a-62 to LEDs 56a, 56b, 58a, 58b and 60a, 60b.
Electrode pins 52a to 52f electrically connected via f
Are arranged in close proximity to each other and each has a small diameter selected. Therefore, in addition to the heat dissipating bases 48 and 50, the six electrode pins 52a to 52f are present in a considerably narrow range, and the work of directly soldering the lead wires 78a, 78b and 80a to 80f to each is quite considerable. With difficulty.

However, in the exposure head 30, a printed circuit board 64 having a diameter larger than that of the support member 38 is used, and holes 66a and 66b for fitting the heat dissipation bases 48 and 50 to the printed circuit board 64 and the respective electrode pins.
Holes 68a to 68f for fitting and engaging the 52a to 52f are provided. Then, as shown in FIG.
Includes first and second patterns 70a and 70b extending outward in the radial direction including holes 66a and 66b, and third patterns 74a to eighth extending in the outward radial direction including holes 68a to 68f. Forming a pattern 74f. As a result, in the heat dissipation bases 48 and 50, the lead wires 78a and 78b are connected to the respective patterns 70a and 70b.
It suffices to solder to the outer ends of the heat dissipation bases 48 and 50, and even if the heat dissipation bases 48 and 50 are considerably close to each other, there is no inconvenience of integrally soldering the respective heat dissipation bases 48 and 50. On the other hand, similarly for the electrode pins 52a to 52f, the lead wires 80a to 8f
0f may be soldered to the outer edge portions of the patterns 74a to 74f. As a result, it is possible to efficiently perform the work of connecting the lead wires 78a and 78b and the lead wires 80a to 80f to the heat dissipation bases 48 and 50 to the electrode pins 52a to 52f.

Moreover, the electrode pins 52a to 52f have a fine diameter as described above, and, for example, the electrode pins 52a to 5f, respectively.
If the lead wires 80a to 80f are directly soldered to the 2f, problems such as breakage are likely to occur. Therefore, the exposure head 30
The electrode pins 52a to 52f as shown in FIG.
The electrode pins 52a to 52f can be firmly held by fitting and soldering to the 68a to 68f.

In the present embodiment, the printed circuit board 64 is adopted, but instead of this, for example, a disk-shaped plate having a larger diameter than the support member 38 is prepared, and each pattern 70a is provided on this plate. , 7
A conductive member made of a metal plate corresponding to 0b and 74a to 74f may be engaged and configured.

[Advantage of the Invention] As described above, according to the present invention, the electrodes connected to the respective light emitting elements are fitted into the holes provided in the holding member, and
The holding member is provided with a conductive portion that is electrically connected to each electrode and extends outward, and a conductor wire is connected to the outer end of the conductive portion by soldering or the like. Therefore, in particular, even if a plurality of electrodes are arranged in a narrow space,
There is no inconvenience that the electrodes are electrically connected to each other due to poor soldering, and the work of connecting the conductive wires to the electrodes can be performed very easily and reliably. Therefore, the assembly work of the exposure head can be simplified at once, and an efficient assembly process can be achieved. Moreover, there is an advantage that an electrode having a fine diameter can be firmly held by a holding member to prevent breakage of the electrode.

Although the present invention has been described with reference to the preferred embodiment, the present invention is not limited to this embodiment.
It goes without saying that various improvements and design changes can be made without departing from the scope of the present invention.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an image recording apparatus incorporating an exposure head according to the present invention, FIG. 2 is a perspective view with a part of the exposure head according to the present invention omitted, and FIG. 3 is a vertical section of the exposure head according to the present invention. FIG. 4 is an explanatory view showing a state in which lead wires are connected to a printed circuit board which constitutes the exposure head according to the present invention. 10 …… Main body, 12 …… Casing 14 …… Exposure section, 16 …… Water application section 18 …… Heat development transfer section, 20 …… Control section 26 …… Drum, 30 …… Exposure head 32 …… Condensing Lens, 36 ... Support 38 ... Support member, 44, 46 ... Base 56a, 56b, 58a, 58b, 60a, 60b ... LED 64 ... Printed circuit board, 66a, 66b ... Holes 70a, 70b , 74a to 74f …… Pattern P …… Image receiving material, F …… Photosensitive material

Claims (1)

[Scope of utility model registration request] 1. An exposure head for forming an image by irradiating light on a record carrier from a plurality of light emitting elements controlled based on an image signal, wherein the plurality of light emitting elements are arranged and each light emitting element is provided. A conductive base that is electrically connected to the element and has a long heat dissipation base integrally formed on one surface thereof,
A support member that fits the heat dissipation base to support the base, an electrode that fits the support member and is connected to each of the light emitting devices, and a plurality of holes into which the heat dissipation base and the respective electrodes fit. And a holding member formed with, the supporting member and the holding member are held at a predetermined distance from each other,
The holding member is provided with a conductive portion electrically connected to the electrode and the heat dissipation base at one end portion extending inward of the holding member, and at the other end portion extending outward of the conductive portion. An exposure head for an image recording apparatus, characterized in that a conductive wire that can be connected to a control unit or the like is attached.